Apparatus for lowering ships&#39; boats.



0. SMITH. APPARATUS FOR LOWBRING sms' BOATS.

APPLICATION FILED AUG. 14, 1907. 91 0,594.

Patented Jan. 26, 1909.

4 SHEETS-SHEET 1.

Witnesses. 9 7%. m

GQ SMITH.

APPARATUS FOR LOWERING SHIPS BOATS.

APPLICATION FILED AUG.14, 1907. 910,594;

Patented M11126, 1909.

4 SHEETS-SHEET 2.

Witnesses.

f Inventoii A wam THE NORRIS PETERS c0, WASHINGIUN 1:. c4

0. SMITH.

APPARATUS FOR LOWERING SHIPS BOATS. APPLICATION FILED AUG. 14,1907.

910,594. Patented Ja.11.26, 1909.

4 SHEETS-SHEET 3.

Witnesses.

W 7L Inventor:

THE YOREIS PETERS co., WASHINGYON, n. c.

v 0. SMITH. APPARATUS FOR LOWBBING SHIPS BOATS.

APPLICATION FILED AUG. 14, 1907.

- Patented Jan. 26, 1909.

' 4 SHEET8BHEET 4.

Inventor.

Witnesses.

OHRISTEN SMITH, OF SLEMDAL, NEAR CHRISTIANIA, NORWAY.

APPARATUS FOR 'IJOWEBING SHIPS BOATS.

Specification of Letters Patent.

Patented Jan. 26, 1909.

Application filed August 14, 1907. Serial No. 388,523.

To all whom it may concern:

Be it known that I, OHnrsTnN SMITH, a subject of the King of Norway,residing at Slemdal, near hristiania, Norway, have invented certain newand useful Improvements in Apparatus for Lowering Ships Boats; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawings, and to letters or figures of reference markedthereon, which form a part of this specification.

This invention relates to an apparatus for lowering ships-boats, of thekind wherein the usual davits are replaced by suspension posts swingingabout horizontal pivots by means of which the boat can be moved far outfrom the side of the ship before being lowered into the water. Variousdesigns of such apparatus have been tried without, so far as it isknown, an arrangement having been provided, that would satisfy therequirements, which professionally should be fulfilled in this kind ofappliance.

By the arrangement which forms the subject-matter of this inventionstress is laid on giving the apparatus the greatest possible simplicityand such a construction that the manipulations necessary in using theapparatus are of, the kind to which a sailor is accustomed in his dailyoccupation.

The boat rests on chocks which can be quickly removed by means of asystem of tackles or similar appliances; the boat then hangs freely in aframe-like contrivance which is capable of turning in a vertical planeon pivots placed considerably lower than the boat and inside its pointof suspension. This suspension frame is kept in position by a system oftackles controlled from the boat and these tackles have only to be easedoff in order that the boat may be brought away from the side of thevessel ready to be lowered into the water. To the suspension frame areattached bars whose other ends are arranged to be movable in atransverse direction, being at the same time connected with ratchet andpawl arrangements to prevent any inward movement. By this means therolling of the ship will not cause the suspensionframe to turn inwardlywhile being lowered.

One construction of apparatus embodying this invention is shown in theaccompanying drawings.

Figure 1 is a perspective view of the apparatus. Fig. 2 is a crosssection of the'up'p'er part of a vessel fitted with the improvedarrangements of davits, the checks being removed, with the boat swungoutward ready to be lowered. Fig. 2 is a similar view showing the boaton the chocks. Fig. 3 is a side view of the boat and davit in the latterposition. Fig. 4 is a detail longitudinal section of a ratchetmechanism. Fig. 5 is a cross section of the same. Figs. 6, 7 and '8 showon a smaller scale an end view, side view and plan view respectively ofa slightly modified construction of the improved arrangementsof davitsand Fig. 9 is an end view of a third mode of construc tion.

The boat is suspended in a davit framed, which is preferably made ofH-bars and is free to swing, being attached to the deck at (Z, at apoint inside that from where the boat is suspended. The two verticalparts of the frame are supported laterally by par allel bars I) forminga slot between them and which project from the gunwale of the ship backover the deck, so as to form a support for an awning. These guide barsalso form a substantially horizontal guide for the inner ends of bars 0the outer ends of which are fastened to the frame a. Each bar e isprovided at said inner ends with rollers f (Figs. 4 and 5) running onflanges formed on the iron bars I), and with a pawl g, which by means ofa counterweight h is kept in gear with a ratchet i fastened to the underside of a plate 9' which connect the bars b in pairs. The object of thisarrangement is to prevent the davit frame in a high sea, from going backwhile the boat is being lowered.

The chocks k, on which the boat rests, are kept in a substantiallyupright position, slanting somewhat outwardly, (see Fig. 3) by two barsZ, fastened between two lug pieces m on the deck by means of a bolt 11.passing through the lugs and through the hole in each bar Z. A rope pconnected to each chock passes around pulleys g and is connected to thebolt n so that when the latter is withdrawn from the holes the pullgiven to the rope by the withdrawal will cause the chocks to dro Thedavit frame is lowered and raised by means of a rope 1" which passesthrough blocks r r connected respectively to the frame and ship and theboat is connected with the frame by a tackle s.

The modified'constructions shown in Figs. 6 and 7 are useful in caseswhere the feet or pivots of the davit frame are placed at the same levelas the chocks. These figures also illustrate an improved arrangement ofthe boat tackles whereby any movement of the boat in either a transverseor longitudinal direction is prevented. The blocks are divided in such away that the end of. the rope passes through a block if fastened to thedavit frame and from there down to the block in the boat. The two partsof the rope u, i) will thus make an angle with each other and anyswinging of the boat is thereby made impossible.

This construction shown in Fig. 8 illustrates how a single tackle a:with two ropes w, w leading to the davit may be employed instead of twoseparate tackles for lowering the latter.

In the construction shown in Fig. 9 the stanchion bars I) are slanting,their upper ends being attached to a vertical pillar I) while horizontalstruts c which form a guide for the bars 0 are placed lower down.

When the boat is to be lowered into the water the mode of procedure isas follows: The first man arriving should loosen the chocks and turnthem down by pulling at frames are in their extreme position. When theproper moment for lowering the boat arrives the one in charge gives theword and the boat tackles are eased off quickly. VVhen' the boat is inthe water. the tackles are cast loose and unhooked and the boat is free.

I claim V A boat lowering apparatus, comprising a pivoted clavit-frame,angular guides therefor, rigid members having their outer ends connectedwith the davitframe, rollers on the inner ends of the rigid membersresting on flanges formed on the guides, weighted pawls mounted on saidinner ends, racks on the guides adapted to be engaged by said pawls andtackle for operating the frame in combination with suitable chockssituated between the guides adapted to support a boat when the frame isin a raised position.

In testimony that I claim the foregoing as my invention, I havesigned myname in presence of two subscribing witnesses.

OHRISTEN SMITH. lNitnesses:

WALDEMAR PETERSEN, H. A. ESTABROOK.

